msm: kgsl: Add support for Android's sync point

The Android sync point framework will replace the synchronization
previously implemented by genlock. This change implements the KGSL
component of the sync point framework by creating a fence that is
automatically signaled by KGSL when it's timestamp expires. The
fence FD is returned to the user driver so that another process
can wait for the sync point.

Change-Id: Ifee38dfde00e551f3524f7a37833938dcdb64905
Signed-off-by: Jeff Boody <jboody@codeaurora.org>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>

msm: kgsl: implement sync compare callback

The compare callback is required to test the order that
sync pts will signal. Failing to implement the compare
callback results in kernel panics for some use cases.

Change-Id: Ibea1497c12fd8cc66087ff52d3709a07793f215f
Signed-off-by: Jeff Boody <jboody@codeaurora.org>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
(cherry picked from commit b44e3b4fb92810703ad296a5c9f829c5f86ffe4a)
Signed-off-by: Shruthi Krishna <skrish@codeaurora.org>

msm: kgsl: Make the GPU device aware of the next pending event

The adreno core needs to know what the next event pending for
any given context is so it can mark the interupt to be fired.
If this isn't done then some timestamps that don't have a
matching waittimestamp call won't fire an interrupt. This is
dangerous on the last interrupt/event before a context goes
away.

Change-Id: Ic0dedbad71f6de07b43b0656128c76509326d645
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>

Conflicts:
	drivers/gpu/msm/adreno.c
	drivers/gpu/msm/adreno.h
	drivers/gpu/msm/adreno_drawctxt.c
	drivers/gpu/msm/adreno_ringbuffer.c